You can't. Best you can do now is to limit how much of your life you are going to devote to trying to ressurrect the file, and then bemoaning and/or mourning the loss of your work, the waste of your time.

Cut immediately to the chase. End the wasted time right now by starting again from whatever artefacts you may have or from scratch if you have no artefacts.

DO IT. DO IT NOW. DON'T WAIT FOR A BETTER ANSWER, TAKE THIS ONE AND GET BACK ON IT IMMEDIATELY.